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10 Mar 2016

Since March 1999, the Ethernet industry has been working on providing solutions to increase the speed of Ethernet from 1 to 10 gigabits per second. For enterprise LAN applications, 10 Gigabit Ethernet enables network managers to scale their Ethernet networks from 10 Mbps to 10,000 Mbps, while leveraging their investments in Ethernet as they increase their network performance. There are various types of cables and transceivers available for making Ethernet connections at speeds of 10 Gigabit per second. This article will illustrate both the copper and fiber connectivity options for 10 Gigabit Ethernet.


Standards bodies initially offered several options for the 10-Gigabit transceiver. The one that ultimately evolved as...

08 Mar 2016

1000BASE SFP transceiver is a device that interfaces a network device motherboard to a fiber optic or copper networking cable. It is designed to support Gigabit Ethernet, Fibre Channel and other communications standards. It can be intermixed in combinations of IEEE 802.3z- compliant 1000BASE-SX, 1000BASE-LX/LH, or 1000BASE-ZX interfaces on a port-by-port basis. Here are the most common types of 1000BASE SFP transceiver modules.

1000BASE-LX SFP Transceiver

LX stands for long wavelength. 1000BASE-LX is a physical layer specification for Gigabit Ethernet over fiber optic cabling as defined in 802.3z. 1000BASE-LX SFP transceiver uses long wavelength laser (1310 nm) over multi-mode and single-mode fiber. It is compatible with the IEEE...

05 Mar 2016

DDM which stands for digital diagnostics monitoring is specified by the industry-standard SFF-8472. Modern optical SFP transceivers can support standard digital diagnostics monitoring (DDM) functions.which is also known as digital optical monitoring (DOM). What makes these transceivers with DDM/DOM function different from the traditional modules? This article will give you the answer.

What is Digital Diagnostic Monitoring (DDM)?

Very often, we can see GLC-LH-SMD, or on the label of modern transceivers. Actually, the “D” in GLC-LH-SMD represents the DDM function we are talking about today. When choosing fiber optical transceivers in the market, you may have the option with or without DDM/DOM. At present, most of high-end switches...

03 Mar 2016

As Gigabit Ethernet leverages the organization’s existing investment in Ethernet and Fast Ethernet infrastructures, 1000BASE-T has become an attractive option by providing a simple, cost-effective performance boost while continuing to use the dominant horizontal/floor-cabling medium. It addresses the exploding bandwidth requirements on current networks that are the result of implementation of new applications and the increasing deployment of switching at the edges of the network.

1000BASE-T Key Specifications

1000BASE-T is specified to run over four pairs of Category 5 balanced cabling. The 1000BASE-T standard leverages the existing cable infrastructure as it is specified to operate up to 100 meters on Category 5 cabling. The...

01 Mar 2016

With the development of the SFF-8436 Multi Source Agreement, many vendor are now offering a variety of IEEE- and MSA-compliant Quad Small Form-Factor Pluggable Plus (QSFP+) devices for fiber networks. And there are basic three 40G QSFP+ optics for this standard: 40G LR4 QSFP+ transceiver, 40G SR4 QSFP+ transceiver and 40G LR4 parallel single mode (PSM) transceiver. This article will take a close look at these 40G QSFP+ optics for high-density 40 GE connectivity.

40G LR4 QSFP+ Transceiver

Conforming to the 802.3ba (40GBASE-LR4) standard, the 40G LR4 QSFP+ transceiver together with the LC connector can support an optical link length up to 10 kilometers over single mode fiber. For example, the following Juniper JNP-QSFP-40G-LR4...

26 Feb 2016

Fiber optic cables are the medium of choice in telecommunications infrastructure, enabling the transmission of high-speed voice, video, and data traffic in enterprise and service provider networks. Generally speaking, there are two major kinds of fiber-optic cabling: single-mode and multi-mode.

While it's not impossible to get the two types to interact with the right transceivers and intermediate hardware, there's significant signal loss involved in the transition and, therefore, much higher power requirements to re-boost it. It's best to simply lay the kind of fiber that best meets your needs.

What Makes Multi-Mode Fiber Different

The significant difference in multi-mode is the size of its "core," the actual glass wire which...

19 Feb 2016

Optical loss testing of multimode fiber can be affected by many variables, including fiber mismatch, the type and quality of the test reference cords and the launch conditions for launching light into the fiber under test. This article will look at how these different variables can affect the optical loss performance of a link under test.

Optical Loss Testing - Why It Is Important

Providing an accurate method for optical loss testing of multimode fiber is becoming a lot more important for higher data rate applications that place more stringent requirements on the maximum allowable loss for a channel between an optical transmitter and an optical receiver. The higher the data rate, the tighter the loss budget for a channel. The...

16 Feb 2016

With an increasing demand for more bandwidths, faster data rates and higher performance in telecommunication networks, the business case for 40 Gigabit Ethernet is becoming inescapably compelling. However, many users may feel confused when using 40G cables and optical transceivers. This article will solve the most frequently asked questions on Fiberstore’s 40G cabling and transceivers.

Q1: What 40G cables and transceivers are available from Fiberstore? 

Fiberstore supplies a full range of both copper cables and optical transceivers for 40GbE, compliant to the IEEE standards. For copper both QSFP+ to QSFP+ (40G to 40G) and QSFP+ to SFP+ (40G to 4x10G) cables enable short reach options. For longer distances, Fiberstore offers a wide...

28 Jan 2016

With the expected increase in use of 40 Gbps and 100 Gbps, there is an increasing demand for higher and higher density fiber cabling solutions. Existing and emerging network technologies are driving the need for increased data rates and fiber usage in the data center. High-density cabling with MTP/MPO connectors is essential to address these trends to provide an easy migration from duplex fiber serial transmission to 12- and 24-fiber parallel optics transmission.

What Is MTP / MPO Connector

The MPO connector is a multi-fiber connector defined according to IEC 61754-7 and TIA/EIA 604-5 that can accommodate up to 72 fibers in the tiniest of spaces, comparable to an RJ45 connector. MPO connectors are most commonly used for 12 or 24...

26 Jan 2016

The 40-Gigabit QSFP+ transceiver module is a hot-swappable, parallel fiber-optical module with four independent optical transmit and receive channels. These channels can terminate in another 40-Gigabit QSFP+ transceiver, or the channels can be broken out to four separate 10-Gigabit SFP+ transceivers. The QSFP+ transceiver module connects the electrical circuitry of the system with either a copper or an optical external network. The transceiver is used primarily in short reach applications in switches, routers, and data center equipment where it provides higher density than SFP+ modules.


Installing a QSFP+ Transceiver

The QSFP+ transceiver module can have either a bail-clasp latch or a pull-tab latch. Installation...